Expansion reamer



A. HABEL EXPANS ION REAMER Dec. 21 1926.l

Filed March 5, 1925 gjm/vento@ with a plurality .of segments 5 which when walls 5 and 7. A series of yslots 8l extendv or contracting the reamer.

` surface of the segment H5 is provided'at each the angular flange 11 thereof engages the Patenten Dec. ai, 1ere.A

i, ta TE 'V 'PA T oFFl'ec ARTHUR HABEL, 0F DUTTON, MONTANA.

EXPANSDON BEAMER.

"L, v 1 Application led March 3, 1925. Serial No. 12,840.

The present invention relates to a reamer and has for its principal object to provide structure including a plurality of jaws which may be contracted or expanded easily and quickly as desired. Y

Another important object of the invention is to provide a yreainer structure wherein a plurality of jaws are provided with raclrextensions engagcable with a single gear element in order that the gear element may be rotated for moving the -j aws for expanding has .its lower end journaled through the cap 12 and in the auxiliary cap 19, as at 16.I A squared-portion 17 is projected from the auxiliary cap 19 for engagement with any suitable rotating device. A worm gear 18 is fixed adjacent the end of the gear shaft 15 and 4)is housed within the4 auxiliary cap 19- which is fastened to the top cap( 12 by a bolt or other suitable fastening elements 20. A worm 21 is journaled in this auxiliary cap 19 and meshes with the wprm gear 18 so that when the worm is revolved the worm gearld will be rotated to rotate the shaft 1 5. rlihe shaft 15, at this time, will rotate independently of the body.

Another very important objectl of the invention is to provide a reamer of this natu-re which is possessed of a simple structure which is edective, efiicient, and. reliable in operation, one which is strong, durable, not liable to readily get out of order, easy to manipulate, light, and otherwise well adapted to the purposefor which it is designed.v

With the lforegoing and numerous other objects in view as will appear as thedescription proceeds, the invention resides/.in certain novel features of construction, and in the combination `and arrangement of parts asV will be hereinafter more fully described and structed. Each j aw 23 includes an elongated body portion 2d terminatingat one end iii a pointed extension 25. From one edge' of the l body 2d there project rack'extensions 26 for projecting through the slots 8 of thel adjacent segment.' 5 and for meshing with the gear other havetheseextensions 26 disposed so that they may be extended in: between one another.A l n `lhe'outer edges of the body 2d of thejaws 26 are beveled as is indicated to-advantage in Fig. 2. Vhen the device'is placed in the article 'beiug lremixed, the worm gear .2ly is rotated so as tofexpand the' jaws'in relation to the body until the beveled edges of the jaws engagel the interior periphery-of t e f article. 'Ehe lentire tool is then rotated byA engaging the square-shank 17 with a suitable claimed. j

lin the drawing- 3l Figure l is a longitudinol section through a reamer embodying the features of my in-v vention, 'y

lFig. 2 yis a transverse section therethrough, Fig. 3 is a detail perspective ofone of tire body segments, and Fig. "i is an elevation of' one of the jaws. Referring tothe drawing in detail, it will' be seen that the body of the reamer is formed jaws are 'further expanded by operati-on of the worm l21.

lt will be apparent from the above 'that it have devised'a reamer in which the jawsv 'thereof may be easily' adjusted for expanding or contracting them and in which the parts thereof'. may be readily' assembled or assembled together form adrunistructure. liach segment 5 has a curved outer periphery' and -perpendicularly disposed f inner through the segments 5 transversely thereof and perpendiculariy to the wall 8. r1ithe outer disassembled as desired. end with a shoulder 9. a A bottom cap 10 receives the lower ends of the vsegments- 5 and ent embodiment' of the 'inventionywhatf li have described by way of example, attains lower'shoulders 9.v all the features of advantage enumerated. as

'llhe upper cap 12 receives the upper end of thesegments 5 and the annular flange .13 thereof, engages lthe upper shoulders 9. The ends of the` segments 5 are heldiiixed to the caps 10 and 12 by bolts, screws, or other fastening elements 1d. `A gear shaft 15 extends longitudinally between the segments`5 and and the above description, and it i desired to point out that the umerous' changesinv the details of' construction, and in the coml bination and arrangement of parts may be lit wilhbe further apparent thatjthe pres- A plurality of jaws 23 arel similarly con C shaft 15. lt will be understood that the jaws f which are located at right angles to each rotating machine-and from time to time the t@ desirable in the statement of the invention no' resortedto without departing from the spirit a or scope of the invention as hereinafter.

claimed or sacrificing any of itsadvantages.

' of cylindrical formation having a longitudinally extending bore and includingcgr a plural- Vity of segments provided with outer'ourved surfaces and inner walls disposed at kright angles to eachother, eachl segment provided Witha slot extending perpendeularly to one inner Wall and through the segment, caps for holding the segments together, a plurality of jaws, one for each segment, eaeh jaw provauxiliary cap having a 'squared projeei'fioli 2o to theshaft, a worm journaled in the auXilvided with a rack extension slidably disposed in the slot of the adjacent segment of the body, a gear shaft disposedin the bore of the body and journaled in the caps, said gear shaft meshing With the rack extensions, an

a worm gear in said auxiliary calo, and fixe iary cap and meshing Witlrthe Worm gear al1/in the manner and for the purpose speeilied.

In testimony whereof I aflix my signature.

ARTHUR HABEL. 

